Simplify octal constants in Python code (e.g. 0o0700 -> 0o700).

tests/git_hyper_blame_test.py

 #!/usr/bin/env python
 # Copyright 2016 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 """Tests for git_dates."""
 
 import datetime
 import os
 import shutil
 import StringIO
@@ skipping 214 matching lines @@
 
   COMMIT_A = {
     'some/files/file1': {'data': 'file1'},
     'some/files/file2': {'data': 'file2'},
     'some/files/empty': {'data': ''},
     'some/other/file':  {'data': 'otherfile'},
   }
 
   COMMIT_B = {
     'some/files/file2': {
-      'mode': 0o0755,
+      'mode': 0o755,
       'data': 'file2 - vanilla\n'},
     'some/files/empty': {'data': 'not anymore'},
     'some/files/file3': {'data': 'file3'},
   }
 
   COMMIT_C = {
     'some/files/file2': {'data': 'file2 - merged\n'},
   }
 
   COMMIT_D = {
@@ skipping 248 matching lines @@
                        self.blame_line('C', ' 9) Z'),
                        ]
     retval, output = self.run_hyperblame(['E'], 'file', 'tag_E')
     self.assertEqual(0, retval)
     self.assertEqual(expected_output, output)
 
 
 if __name__ == '__main__':
   sys.exit(coverage_utils.covered_main(
     os.path.join(DEPOT_TOOLS_ROOT, 'git_hyper_blame.py')))